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- Title
Highly Isoselective Coordination Polymerization of ortho-Methoxystyrene with β-Diketiminato Rare-Earth-Metal Precursors.
- Authors
Liu, Dongtao; Yao, Changguang; Wang, Rong; Wang, Meiyan; Wang, Zichuan; Wu, Chunji; Lin, Fei; Li, Shihui; Wan, Xinhua; Cui, Dongmei
- Abstract
Stereoselective coordination/insertion polymerization of the polar ortho-methoxystyrene has been achieved for the first time by using the cationic β-diketiminato rare-earth-metal species. High activity and excellent isoselectivity ( mmmm>99 %) were acheived. The unmasked Lewis-basic methoxy group does not poison the Lewis-acidic metal center, but instead activates the polymerization through σ-π chelation to the active species together with the vinyl group, thus lower the coordination and activation energies as compared with those of styrene derivatives lacking the methoxy group.
- Subjects
STEREOSELECTIVE reactions; POLYMERIZATION; HOMOPOLYMERIZATIONS; VINYL polymers; STYRENE derivatives; METHOXY group
- Publication
Angewandte Chemie, 2015, Vol 127, Issue 17, p5294
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201412166